Foam drainage on the microscale - II. Imaging flow through single Plateau borders

Koehler, S.A. and Hilgenfeldt, S. and Weeks, E.R. and Stone, H.A. (2004) Foam drainage on the microscale - II. Imaging flow through single Plateau borders. Journal of Colloid and Interface Science, 276 (2). pp. 439-449. ISSN 0021-9797

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Abstract:	The liquid in foam forms an interconnected network, which is composed of Plateau borders, nodes, and films. One of the dominant pathways for foam drainage is flow through Plateau borders, and we use confocal microscopy to obtain experimental results for the flow fields inside individual Plateau borders. For three types of surfactants detailed comparisons are made with a model based upon the influence of surface viscosity at free boundaries between the gas in the bubbles and the liquid in the Plateau borders. The model describes the flows well, and we find good agreement between the surface viscosity predicted by this model and representative values found in the literature. We also give a qualitative description of the flow in the nodes.
Item Type:	Article
Copyright:	© 2004 Elsevier Inc.
Research Group:	Physics of Fluids (POF)
Link to this item:	http://purl.utwente.nl/publications/47815
Official URL:	http://dx.doi.org/doi:10.1016/j.jcis.2003.12.060
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